Lock.



K. UMHAUER.

LOCK.

APPLICATION FILED OUT. 9, 1912.

1,106,599. Patentd Aug. 11; 1914 IT S FFTQE.

LOCK.

To all whom "it may concern:

Be it known that I, KARL UMI-IAUER, a subject of the German Emperor, residing at Freiburg-im-Breisgau, in Germany, have invented certain new and useful Improvements in Locks, of which the following is a specification.

This invention relates to looks of the class wherein a slidable locking member is held in locking position by spring-catches which can be disengaged by insertion of a key, and the invention essentially consists in providing the locking member with studs arranged in the path of a key whereof the barrel is slid 011 to the said locking member during insertion, so that the key barrel must be provided with slots arranged in a particular manner in order that the said studs can enter the said slots.

The invention is illustrated in the accompanying drawing, as applied to a velocipede frame, Figure 1 being a side-elevation of the device, Fig. 2 a rear-view, partly in section, and Fig. 3 a detail view, also partly in section.

In the drawing, A represents part of the velocipede frame, B being one of the sprocket wheels, and G being spokes of one of the road wheels. Tubular members a and b are. fixed to opposite sides of the frame, so that a locking pin 0 engaged with the said tubular members, and passing be tween spokes G of the wheel, prevents rotation of the latter. The member a is traversed by a short tube h, which forms the lock case and through which the pin 0 can slide, and the member I) has a socket 6 into which the pin 0 can be inserted. The tube in has a slot 2', into which a boss is on the pin projects, so that the pin cannot be rotated in the tube. Springs f fixed to the exterior of the tube It project through slots into the said tube, so that they normally lie in the path of the pin 0, but can yield, to give passage to the pin, when the latter is pushed through the tube a toward the socket 6 The pin 0 has a short, thin shank g at the end which lies within the tube a. when the pin is in the locking position shown in Fig. 2, and the springs f then engage behind the shoulder formed at the junction of the shank with the pin, so that the latter cannot be withdrawn. The withdrawal of the pin 0 is effected by means of a key 03, the barrel of which can be inserted into the tube a and fits over the shank g. The latter has a series of studs 8 Specification of Letters Patent.

Application filed October 9, 1912.

Patented Aug. 11, 191%. Serial No. 724,862.

arranged about its circumference, and the barrel of the key of has slots 11 arranged in such positions that the studs 8 can enter these slots and thus enable the key to be inserted. The insertion of the key (Z pushes the springs f outward, away from the shoulder of the pin 0, thus enabling the latter to be withdrawn. The slots n are bent at their rear ends, so that when the key has been inserted it can be rotated, whereby it is so engaged with the studs .9 as to enable the pin 0 to be withdrawn by means of the key.

It will be noted that the studs 8 form obstacles to the insertion of any implement, other than the proper key, for pushing the springs f outward. It will also be seen that slight variations in the positions of the studs .9, both in regard to their distance from the shoulder and their radial position, necessitates similar differences in the arrangement and length of the slots '11, in the key, so that a great variety of locks can be constructed, each requiring a different key. Slight clifferences in the bent or oblique portions of the slots 1?. may also be made, to prevent the use of the key in a lock for which it is not designed.

Instead of placing the lock near the hub of the wheel it mav be placed near the rim, or in other convenient position, and the utility of the lock is not confined to the locking of wheels.

What I claim as my invention and desire to secure by Letters Patent of the United States is 1. In a lock the combination of a sleeve, a locking member slidable in said sleeve, said locking member being provided with a shoulder and with studs 0n difi'erent parts of its surface, means preventing rotation of said locking member in said sleeve, a spring attached to said sleeve and adapted to engage said shoulder for retaining said locking member and a key having a barrel adapted to slide on to said locking member and lift said spring out of engagement with said shoulder, said key barrel having slots which correspond in position with said studs and having lateral branches to receive said studs whereby said key can be coupled with said locking member by rotation of the key.

2. In combination, a cycle frame including a fork, a sleeve extending through one side of said fork, a socket at the opposite side of the fork, a wheel mounted in the fork, a locking rod adapted to be inserted through said sleeve to pass between the wheelspokes and enter said s00ket,said rod being provided with a shoulder and with studs on different parts of its surface, a swing attached tosaid sleeve and adapted to engage said shoulder, for retaining said sleeve, and a key having abarrel adapted to slide en te saidlocking rod in said sleeve and lift said spring out of engagement with said red by rotation of the key.

studs, whereby said key can be coupled with In witness whereof I have signed this specification in the presence of two'witnesses.

Witnesses: V

AneUs'r OOSTERMAN, JACOB SCHMIDT.

KARL YUMI-IAVUEVR.

copies of this patent may he obtained for five cents each, by addressing the Commissioner of Patentl,

' washington, D. G. a i 

